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Head-to-head comparison

GPT-4 Turbo vs GPT-5.4 Nano

GPT-4 Turbo (OpenAI) and GPT-5.4 Nano (OpenAI) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 22 September 2026

As of 22 September 2026, GPT-5.4 Nano holds the stronger ModelCap Index position (#81 vs #170); GPT-5.4 Nano is 24× cheaper per output token ($1.25/1M vs $30.00/1M); and GPT-5.4 Nano offers the longer context window (400K vs 128K tokens).

Which should you choose?

Choose GPT-4 Turbo if…

  • ModelCap publishes no field on which GPT-4 Turbo leads GPT-5.4 Nano for this pair.

Choose GPT-5.4 Nano if…

  • you want the stronger overall ModelCap Index position — #81 against #170 (57.3 vs 30.9 points).
  • API cost matters — $1.25/1M output tokens against $30.00/1M, about 24× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.20/1M against $10.00/1M.
  • you need the longer context window — 400K tokens against 128K.
  • you want provider choice — 2 listed API providers against 1.
  • Arena coding is your yardstick — 1460 against 1347.
  • AA Humanity's Last Exam is your yardstick — 28.3% against 3.1%.
  • you want the more recently listed model — GPT-5.4 Nano was listed 17 March 2026, GPT-4 Turbo 9 April 2024.

GPT-4 Turbo vs GPT-5.4 Nano: specs, pricing and context

Specification comparison of GPT-4 Turbo and GPT-5.4 Nano
FieldGPT-4 TurboOpenAIGPT-5.4 NanoOpenAI
ModelCap Index position#170#81
Index score30.957.3
EvidenceMeasuredMeasured
Input price / 1M tokens$10.00$0.20
Output price / 1M tokens$30.00$1.25
Context window128K tokens400K tokens
Max output tokens4K128K
API providers listed12
Weight accessAPI onlyAPI only
Input modalitiesText, ImageFile, Image, Text
First listed9 April 202417 March 2026
PublisherOpenAIOpenAI

Evidence: 2 public benchmark observations across 2 boards · 4 public benchmark observations across 4 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: GPT-4 Turbo vs GPT-5.4 Nano

Public benchmark boards where GPT-4 Turbo or GPT-5.4 Nano has a published result
BoardGPT-4 TurboGPT-5.4 NanoLeads
Arena codingArena (LMArena)13471340–135414601454–1466HighGPT-5.4 Nano
ARC-AGI-2ARC Prize Foundation—5.7%X-HighOnly one result
AA Intelligence IndexArtificial Analysis—20.7intelligence-index:v4.3:xhighOnly one result
AA τ²-Bench TelecomArtificial Analysis—76.0%tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="GPT-5.4 nano (xhigh)":reasoning=trueOnly one result
AA Humanity's Last ExamArtificial Analysis3.1%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="GPT-4 Turbo":reasoning=false28.3%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="GPT-5.4 nano (xhigh)":reasoning=trueGPT-5.4 Nano

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

GPT-4 Turbo vs GPT-5.4 Nano: common questions

Is GPT-4 Turbo better than GPT-5.4 Nano?

GPT-5.4 Nano ranks higher on the ModelCap Index as of 22 September 2026: #81 against #170. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals do not overlap, but the aggregate Index does not predict performance on every task; compare the relevant benchmark configurations before choosing.

Is GPT-4 Turbo cheaper than GPT-5.4 Nano?

GPT-5.4 Nano is cheaper on output tokens: $1.25/1M against $30.00/1M. Input tokens are $10.00/1M for GPT-4 Turbo and $0.20/1M for GPT-5.4 Nano. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $35.00 for GPT-4 Turbo versus $1.02 for GPT-5.4 Nano. GPT-5.4 Nano costs 97.1% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.

Which has the bigger context window, GPT-4 Turbo or GPT-5.4 Nano?

GPT-5.4 Nano has the larger context window: 400K tokens against 128K.

Which is better for coding, GPT-4 Turbo or GPT-5.4 Nano?

Arena coding: GPT-4 Turbo 1347, GPT-5.4 Nano 1460 — GPT-5.4 Nano leads.

Are GPT-4 Turbo and GPT-5.4 Nano open-weight models?

GPT-4 Turbo: API only. GPT-5.4 Nano: API only. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run GPT-4 Turbo and GPT-5.4 Nano?

ModelCap currently lists 1 API provider for GPT-4 Turbo and 2 for GPT-5.4 Nano, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this GPT-4 Turbo vs GPT-5.4 Nano comparison?

Every figure comes from the sealed ModelCap dataset published 22 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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